Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1972_204_1_a10, author = {S. M. Ponomarev}, title = {On convergence of semigroups}, journal = {Doklady Akademii Nauk}, pages = {42--44}, publisher = {mathdoc}, volume = {204}, number = {1}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1972_204_1_a10/} }
S. M. Ponomarev. On convergence of semigroups. Doklady Akademii Nauk, Tome 204 (1972) no. 1, pp. 42-44. http://geodesic.mathdoc.fr/item/DAN_1972_204_1_a10/